What is realpolitik?
a. the concept that political decisions of foreign engagement have to be based on the best interests of all parties concerned
b. the concept that political decisions have to be made by consensus or new alliances should be sought out
c. the concept that political decision about foreign engagement have to be based on preserving the interests of your country above all
d. the concept that a single country, acting alone, has the most realistic chance of meeting its own needs

In my honest opinion , i’d say franklin d roosevelt was a president that impacted our nation , i say this because fdr is voted among top three best us presidents and he was the longest serving president by 3 terms , usually presidents only supposed to have two terms increments of 4 years , equivalent to 8 years total before election time. and he established the fdic , through the 1933 banking act and he established the us , social security system , during his presidency, and established a national minimum wage , through the fair labor standards act , fdr led the allied coalition to victory in wwii and he played a major role in the creation of the united nations.

Use the formula: (n-2)×180, where n is the number of sides(18-2)×180= 28800, now this is the full exterior angle of 18-gon so you divide it by 18.28800÷18=160